1. Until we are intelligent as to its laws and varieties, the main complicating facts of human life must remain unintelligible.
    直到我们理解了风俗的规律性和多样性，我们才能明白人为生活中主要的复杂现象。

2. Until now, scientists believed that specialized cells could not be used to form a complete living thing.
    在此之前，科学家相信特化细胞不能被用来形成完整的生命体。

3. Rastus leads an orderly life.
    拉斯特斯的生活很有规律。

4. Return the form with the remittance to this office.
    将表格连同汇款一同寄回本办公室。

5. Rays from the sun excite and energize the atmosphere of the earth, awakening it to flow, to movement, to rhythm, to life.
    太阳光刺激了地球的大气层，并给予它能量；阳光使空气开始流动，产生节奏，获得生命。

6. Rastus leads an orderly life.
    拉斯特斯生活很有规律，

7. Racing through daytime meals is part of the pace of life in this country.
    白天人人都急急忙忙地吃饭则部分地体现了这个国家的生活节奏。

8. Of all the planets in our own solar system, we are now pretty certain the Earth is the only one on which life can survive.
    我们目前可以肯定的是，在我们太阳系的所有行星中，地球是生命能存在的唯一行星。

9. Only the Earth provides ideal conditions, and even here it has taken more than four billion years for plant and animal life to evolve.
    只有地球提供理想的条件，而即使在这里，植物和动物的进化也用了40亿年的时间。

10. One man continues to lead an active life after eight years with someone else´s heart beating inside him.
    有一位病人在靠别人心脏维持了八年生命之后仍然健壮地生活着。